Wireless communication modules, also known as cellular modules, are essential components in modern electronics, enabling devices to connect and communicate over wireless networks. These modules are crucial for various applications, including the Internet of Things (IoT), smart devices, and global positioning systems. NB-IoT (Narrowband IoT) modules are designed for low-power, wide-area networks, ideal for IoT applications requiring long battery life and wide coverage. 5G and 4G (LTE) modules provide high-speed connectivity, supporting advanced applications like real-time data transmission and high-definition video streaming. GNSS (Global Navigation Satellite System) modules are used for accurate positioning and navigation, critical in applications such as vehicle tracking and autonomous systems. Smart modules, or SoC (System on Chip), integrate multiple functions into a single chip, offering a compact and efficient solution for complex tasks in smart devices and IoT ecosystems.